test: Remove vestigial skip for prompt embeds tests after landing v1 Prompt Embeds support (#25291)

Signed-off-by: Andrew Sansom <andrew@protopia.ai>

tests/entrypoints/openai/test_completion_with_prompt_embeds.py

@@ -14,9 +14,6 @@ from transformers import AutoConfig
 
 from ...utils import RemoteOpenAIServer
 
-pytest.skip("Skipping prompt_embeds test until V1 supports it.",
-            allow_module_level=True)
-
 # any model with a chat template should work here
 MODEL_NAME = "HuggingFaceH4/zephyr-7b-beta"